42521403013 has 2 divisors, whose sum is σ = 42521403014. Its totient is φ = 42521403012.

The previous prime is 42521402993. The next prime is 42521403047. The reversal of 42521403013 is 31030412524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38147167969 + 4374235044 = 195313^2 + 66138^2 .

It is a cyclic number.

It is not a de Polignac number, because 42521403013 - 2⁵ = 42521402981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42521403083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260701506 + 21260701507.

It is an arithmetic number, because the mean of its divisors is an integer number (21260701507).

Almost surely, 2^42521403013 is an apocalyptic number.

It is an amenable number.

42521403013 is a deficient number, since it is larger than the sum of its proper divisors (1).

42521403013 is an equidigital number, since it uses as much as digits as its factorization.

42521403013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 42521403013 its reverse (31030412524), we get a palindrome (73551815537).

The spelling of 42521403013 in words is "forty-two billion, five hundred twenty-one million, four hundred three thousand, thirteen".